<table>
{% for timeslot in timeslots %}
    <tr>
        <td><a href="{% url timeslot_detail not_available_time.id %}">{{ timeslot.day }}</a></td>
        <td>{{ timeslot.start_time }}</td>
        <td>{{ timeslot.end_time }}</td>
    </tr>
{% endfor %}
</table>